B1488

DTC B1488 Generator L - Term High:

CIRCUIT DESCRIPTION
This DTC determines it a fault exists that renders the generator L-terminal continuously high.

CONDITIONS FOR SETTING THE DTC
^ All of the following conditions must be met:
^ Ignition 1 is active and the engine is OFF.
^ The powertrain control module (PCM) is sending the L terminal high class 2 serial data message for 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The body control module (BCM ) stores DTC B1488 in memory.
^ The volts indicator will illuminate.

CONDITIONS FOR CLEARING THE DTC
^ The BCM goes to sleep. The controller reinitializes with the fault cleared.
^ Use the scan tool.

DIAGNOSTIC AIDS
^ When the engine is OFF, inspect for a short to the battery on the 225 circuit.
^ If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This can often cause the malfunction to appear.

TEST DESCRIPTION
The numbers listed below refer to the numbers on the diagnostic table.
2. This step determines if the L-terminal is actually being held low.
3. This step determines if CKT 225 is open.
4. This step determines if CKT 225 has a short to ground condition.
5. This step determines if the Powertrain Control Module (PCM) is reading the L-terminal status equal to the J 39200 DMM voltage readings.